1/4" PHONE JACKS
1. 14B
2. FAL-11
.205 FASTON TERMINAL
3. PC-12A
4. 11
click here to download a schematic
drawing
click here to download a schematic
drawing
(you will need to have Adobe Acrobat installed on your system to do this)
Littel-Jax® COMMERCIAL PHONE JACKS
2- and 3-CONDUCTOR
Littel-Jax phone jacks mate with standard commercial phone plugs and are available with .25 inch and .21 inch inside diameter bushings.
MIL Littel-Jax® PHONE JACKS
2- and 3-CONDUCTOR MIL-SPEC, MIL-J-641 (E)
MIL jacks mate with MIL-type phone plugs with .25 inch (6.35mm) or .21 inch (5.34mm) diameter bushings. Numbers C11 and C12B have a non-turn locating pin which keys the jack to the mounting surface. For low contact resistance applications, jack number C12A has fine silver contacts on shunts and tip springs.
MOUNTING
Chassis/Panel: See Mounting Data drawing below; small
hole is required only for jacks numbers C11 and C12B
with non-turn locating pin.
Maximum Panel Thickness: .156 inch (4mm) for standard
.276 inch (7mm) long bushing; .25 inch (6.35mm) for .375
inch (9.5mm) long bushing.
NOTE: For panels thicker than .25 inch see Thick Panel
Phone Jax.
Insulated Mount: See drawing. S1028 flatwasher and
Part Number S1029 shoulder washer must be
ordered separately for mounting in .437 inch diameter hole.
NOTE: See Hi-D Jax® for jack specifically designed
for insulated mounting without additional washers.
PC Board Mounting: See Recommended PC Board Layout
drawing below for jacks with PC terminals. Recommended
PC board thickness is .062 inches.
Mounting Centers: 1.188 inch (30mm) recommended.
Centers may vary with jack selected, for example, Number
11 mounts on .813 inch (20.6mm) and 14B mounts on
1.125 inch (28.6mm) minimum centers.
PREFIX OPTIONS
|
SERIES |
CIRCUITRY |
| Blank- 1/4" Commercial |
Jack 1-Littel Jax®
|
1- I |
C- Accepts Mill Plug
|
|
2A- III |
FA- .205" Faston Terminals
|
|
2B- IV |
FAL- .205" Faston Terminals and .375" Long Bushing
|
|
3- V |
L- .375" Long Bushing
|
|
3A- VI |
PC- PC Terminals
|
|
3B- VII |
S- Accepts .206 Diameter Plugs
|
|
3E- IX
|
| |
|
4B- XII |
| TWO CONDUCTOR PART NUMBERS |
Part Number
|
Description
|
Jack Schematic1 |
Typical Mating Plug
|
11
|
Open circuit
|
I
|
250
|
C11
|
MIL Number M641/6-1
|
I
|
440
|
FA11
|
.205 inch FASTON terminal
|
I
|
250
|
FAL11
|
.375 inch long bushing
.205 FASTON terminal
|
I
|
250
|
L11
|
.375 inch long bushing |
I
|
250
|
12A
|
Tip shunt |
III
|
250
|
C12A
|
MILNumber M641/12-1 |
III
|
440
|
L12A
|
.375 inch long bushing |
III
|
250
|
PC12A
|
PC board mount |
III
|
250
|
13
|
Isolated "make" circuit |
V
|
250
|
13A
|
Transfer circuit |
VI
|
250
|
| 13E |
Isolated "break" circuit |
IX |
250 |
| THREE CONDUCTOR PART NUMBERS |
12B
|
Double open circuit
|
IV
|
267
|
L12B
|
.375 inch long bushing
|
IV
|
267
|
C12B
|
MIL number M641/5-1,
.210 inch inside diameter
|
IV
|
480
|
13B
|
Tip shunt
|
VII
|
267
|
| 14B |
Double closed circuit |
XII |
267 |
| PART NUMBERS (.210 inch inside diameter bushing) |
S11
|
2 conductor
|
I |
S250
|
S12A
|
2 conductor
|
III
|
S250
|
S12B
|
3 conductor
|
IV
|
S267
|
| S13B |
3 conductor |
VII |
S267 |
| 1 Refer to jack schematics on pages 65 and 66. Other circuits are available; contact factory. |
SPECIFICATIONS
MECHANICAL
Life: Commercial Jacks - 10,000 insertion/withdrawal
cycles, minimum.
Military Jacks - 20,000 insertions/withdrawals, minimum.
Mechanical Shock: Military Jacks - Per MIL-STD 202,
method 213, Test Condition H (75g).
Vibration: Military Jacks - Per MIL-STD-202, method 213,
(10-55 Hz).
Insertion/Withdrawal Forces: (see charts below)
| Commercial Jacks |
Plug Diameter (inches)
|
.210
|
.250
|
Insertion (maximum)
|
7 lb.
|
7 lb.
|
| Withdrawal (minimum) |
1 lb. |
1 lb. |
| Military Jacks |
Part Number
|
C11
|
C12A
|
C12B
|
Insertion (maximum)
|
6 lb.
|
7 lb.
|
6 lb.
|
Withdrawal (minimum)
|
2 lb.
|
3 lb.
|
1.5 lb.
|
| Withdrawal (maximum) |
7 lb. |
7 lb. |
5 lb. |
ELECTRICAL
Contact Resistance: Commercial Jacks - .030 ohms
maximum (initial), .050 ohms maximum (after humidity,
durability exposure). Per MIL-STD-202E.
Military Jacks - .010 ohms maximum (initial), .020 ohms
maximum (after life), .10 ohms maximum (after salt spray).
Insulation Resistance: Commercial Jacks - 10,000 M(omega)
minimum (initial), 1,000 M(omega) minimum (after humidity).
Military Jacks - 10,000 M(omega) minimum (initial), 1,000 M(omega)
minimum (after humidity, durability exposure).
Dielectric Withstanding Voltage: 500 V, 60 Hz (rms) AC.
Contact Rating: 1 A, 25 V DC.
ENVIRONMENTAL
Thermal Range: Commercial Jacks; -55°C to +85°C (non-
operating); -20°C to +65°C (operating).
Military Jacks; -55°C to +85°C (non-operating); -40°C to
+65°C (operating).
Thermal Shock: Commercial Jacks - Per MIL-STD 202,
method 107. Military Jacks - Per MIL-STD 202,
method 107.
Humidity: Commercial Jacks - Per MIL-STD 202,
method 106. Military Jacks - 0% to 95% operating and
non-operating.
Salt Spray: Commercial Jacks - Per MIL-STD 202,
method 101. Military Jacks - Per MIL-STD 202, method
101 (48 hours).
Moisture Resistance: Military Jacks - Per MIL-STD 202,
method 106 (240 hours).
MATERIAL
Mounting Bushing: Nickel-plated copper alloy.
Insulation: Rigid plastic.
Springs: Special copper alloy. Integral contacts are
standard in the isolated switching circuits; fine silver
contacts in C12A switching circuit.
Sleeve Terminal: Copper alloy.
Hardware: Supplied with one Number P10001 copper alloy
nickel-plated hex nut, and one Number S1022 steel
nickel-plated washer - except copper alloy nickel-plated
washer
Number S10451 supplied on C11, C12A and C12B.
* Commercial jacks feature integral contacts. Integral contacts should not be used where low contact resistance is a requirement.
